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• W3130074383 endingPage "e0247725" @default.
• W3130074383 startingPage "e0247725" @default.
• W3130074383 abstract "Plant detritus represents the major source of soil carbon (C) and nitrogen (N), and changes in its quantity can influence below-ground biogeochemical processes in forests. However, we lack a mechanistic understanding of how above- and belowground detrital inputs affect soil C and N in mountain forests in an arid land. Here, we explored the effects of litter and root manipulations (control (CK), doubled litter input (DL), removal of litter (NL), root exclusion (NR), and a combination of litter removal and root exclusion (NI)) on soil C and N concentrations, enzyme activity and microbial biomass during a 2-year field experiment. We found that DL had no significant effect on soil total organic carbon (SOC) and total nitrogen (TN) but significantly increased soil dissolved organic carbon (DOC), microbial biomass C, N and inorganic N as well as soil cellulase, phosphatase and peroxidase activities. Conversely, NL and NR reduced soil C and N concentrations and enzyme activities. We also found an increase in the biomass of soil bacteria, fungi and actinomycetes in the DL treatment, while NL reduced the biomass of gram-positive bacteria, gram-negative bacteria and fungi by 5.15%, 17.50% and 14.17%, respectively. The NR decreased the biomass of these three taxonomic groups by 8.97%, 22.11% and 21.36%, respectively. Correlation analysis showed that soil biotic factors (enzyme activity and microbial biomass) and abiotic factors (soil moisture content) significantly controlled the change in soil C and N concentrations ( P < 0.01). In brief, we found that the short-term input of plant detritus could markedly affect the concentrations and biological characteristics of the C and N fractions in soil. The removal experiment indicated that the contribution of roots to soil nutrients is greater than that of the litter." @default.
• W3130074383 created "2021-03-01" @default.
• W3130074383 creator A5013968309 @default.
• W3130074383 creator A5015227766 @default.
• W3130074383 creator A5045224722 @default.
• W3130074383 creator A5047105685 @default.
• W3130074383 date "2021-02-25" @default.
• W3130074383 modified "2023-10-13" @default.
• W3130074383 title "Effects of litter and root manipulations on soil carbon and nitrogen in a Schrenk’s spruce (Picea schrenkiana) forest" @default.
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• W3130074383 doi "https://doi.org/10.1371/journal.pone.0247725" @default.
• W3130074383 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7906406" @default.
• W3130074383 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33630965" @default.
• W3130074383 hasPublicationYear "2021" @default.
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